Functions Of 5-Solenoid Valve Assembly - Doosan DX225LC-3 Shop Manual

Functions of 5-Solenoid Valve Assembly

The solenoid valve assembly controls the following functions.
1. Pilot Cutoff
2. Breaker Pressure Supply
3. High/Low Travel Speed
4. Main Pressure (Power Boost) Increase
5. Two-Pump Mode Selection
Functions and Operations of Solenoid Valves
Reference
Number
C1
Breaker Pressure Sup-
C2
C3 High/Low Travel Speed
Main Pressure (Power
C4
Boost) Increase
Two-Pump Mode
C5
Solenoid Valve Assembly
Function
Provides pressurized oil coming from the pilot pump for
Pilot Cut-off the pilot pressure supply solenoid valve to operate
each work system.
Supplies pilot pressure for the pedal valve assembly
ply and shuttle valve.
Sets low and high travel speed. Shifts speed between
both depending on the state of the solenoid valve or a
signal detected in the e-EPOS controller.
Temporarily increases the pressure setting of the main
relief valve, to increase the excavation power.
Supplies pilot pressure to two-pump valve that controls
the two-pump function so it ready to work in the
Selection
two-pump mode during breaker/shear mode.
Operations Remarks
SP002406
Page 7